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Thermodynamics: Calculating Latent and Specific Heat, Example Problem

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This video show how to calculate the heat needed take solid ice, melt it and then raise the temperature of the liquid water.
Latent heat is the heat added to or removed from a material to change the phase of the material without changing its temperature. Examples are latent heat of fusion which is the heat needed to melt or freeze a substance and latent heat of vaporization which is the heat involved in vaporizing or condensing a material.
Specific heat it is the amount of energy that must be added to or removed from one unit of mass of a substance (usually a kg or g) in order to cause an increase of one degree celsius (or Kelvin).
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Опубликовано:

20 авг 2024

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Комментарии : 93

@heymazing6078 2 года назад

I'm from Jamaica and I have exams tmr and I never understood latent heat or specific heat capacity but this video and brian helped me a lot and now I am more confident that I will pass my exams...I am looking forward to watching the maths videos.

@stepbystepscience 2 года назад

Glad it helped and best wishes for the exams!!

@joelramos2100 Год назад

The answer was supposed to be 1277525 J or 1277.525 if you add all of them. I was confused for a second there.

@sharathbalachandra9495 4 года назад

hi, i think u have made a calculation mistake. It should be 1277525 Joules

@vickyvo8464 Год назад

Yeah,I calculated it too

@stevenwilson5556 3 года назад

Perfect, short, sweet, and to the point.

@stepbystepscience 3 года назад

Thanks very much. Glad you liked it!

@shreesai932 3 года назад

It is so helpful to me.i have searched this type of video for 30 minutes. At last i found it.

@stepbystepscience 3 года назад

I'm glad it was helpful! Thanks for the comment.

@hellocoding6641 Год назад

Excellent explanation! Earlier I had confusion in solving such questions but now its crystal clear!

@stepbystepscience Год назад

Great to hear, thanks for the comment!

@olivia_chen 22 дня назад

very instructional and clearly explained, thank you

@stepbystepscience 17 дней назад

Glad it was helpful!

@shahin2324 3 года назад

Been watching your videos since I was in high school!!! Thanks for putting the time and effort into making these videos!

@stepbystepscience 3 года назад

So nice of you. Thanks for the positive feedback!

@jehovahmanorriak1942 3 года назад

You have made it well, thanks to you for that great help. You're now better by far compare to my current lecture🙆

@stepbystepscience 3 года назад

You're welcome. Glad to be of help!

@neylsonrodrigues7350 2 года назад

This was great. explains how I will calculate energy use in my up and coming lab. thank you

@stepbystepscience 2 года назад

Glad it was helpful! Thanks for watching.

@jasminec9131 Год назад

Thankyou u literally helped me so mcuh to recap.. i hv a test tmr. thankyou!

@stepbystepscience Год назад

Best of luck!

@pls8412 2 года назад

Bro thnx so much for this video I was looking for a simple and short video and I found it. I have a physics test the same day so now I won’t be struggling. Thnx a lot

@stepbystepscience 2 года назад

You're welcome and hope the test went well!

@okila7096 3 года назад

Imagine the world all teachers like this guy , thanks

@stepbystepscience 3 года назад

Thanks so much!

@abhishekbhattacharya6023 5 месяцев назад

It helped me thanks sir ❤

@stepbystepscience 5 месяцев назад

Glad to hear that

@dicejr5751 Год назад

Really descriptive and helpful.....!!

@stepbystepscience Год назад

Glad it was helpful!

@Odudu-AbasiEssien-mq5es Год назад

Nice explanation

@stepbystepscience Год назад

Thanks so much!

@aedancharlton8288 3 года назад

Thanks a lot. I've got a science test coming up and this was very useful :)

@stepbystepscience 3 года назад

Best of luck on your test!

@aedancharlton8288 3 года назад

@@stepbystepscience thank you

@dsgaming4606 2 года назад

Thankyou for brilliant explanation.

@stepbystepscience 2 года назад

You are very welcome! Glad you liked it.

@Alice-pw2nt 3 года назад

I have a question. I'm kind of confused,so when we calculate latent heat do we not convert the °C into Kelvin?

@appyyy6936 3 года назад

Nope

@emmanueljohngallo8007 Год назад

very good sir

@stepbystepscience Год назад

Many thanks!

@markjustinenier9028 3 года назад

Nice explanation, a student from Philippines here

@stepbystepscience 3 года назад

Thanks! 😃

@franklinetogoch Год назад

Well explained 👏🏽. Now , can this concept be use to explain why it is easier to distill a solvent such as Toluene compared to water, considering the fact that Toluene has a higher boiling point than water?

@adrianaestrada3853 Год назад

Thank you for this!!

@stepbystepscience Год назад

Thank you for commenting

@ayeshakhalid2836 3 года назад

Thankkk youuuu sooo muchh!!! you made my problems now very easy!

@stepbystepscience 3 года назад

You are welcome! Glad to help.

@areukiddinme8438 3 года назад

Thanks doctor, this was helpful

@stepbystepscience 3 года назад

Glad to hear that, you're very welcome!

@areukiddinme8438 3 года назад

@@stepbystepscience doctor is it possible for you to solve a few more questions that has a unique way to solve? For example, not having a mass not density but having a volume, or dropping an object into water, you know those vary kinds of questions. This would be so helpful and appreciated and i will make sure to share it to all my classmates.

@nautiyal80 4 года назад

How we can make calculations for entopy change for same question

@chemistryworld4783 4 года назад

Good video 👍😁👌👍💯

@mirac8leme715 3 года назад

Thank you so much It helped

@stepbystepscience 3 года назад

Fantastic, you're very welcome!

@emma-qc9wi 2 года назад

what would happen if you reversed the equation so that i would be able to use it to find the energy transferred away from 100g of steam @ 100 degrees to change it to a liquid?

@stepbystepscience 2 года назад

You would get the same amount of heat out.

@hdadam203 2 года назад

God bless

@bashiiir 7 месяцев назад

In the Rankine steam power plant, 2 kg of steam at enters the condenser. Determine the amount of heat rejected by the steam in the condenser to change its phase from vapor to liquid in an isothermal process. Take the latent heat of vaporization of water is 2260 kJ/kg. Please help solve this

@SsekimwanyiAkim День назад

Xans sir for da explanation but ur somehow so speedy can u plz reduce da speed

@stepbystepscience День назад

Sorry, it is a balance between talking to slowing and talking to fast. Of course you can always pause the video and rewind a bit if you need to.

@pkart8451 2 года назад

Thanks for vedio maker

@stepbystepscience 2 года назад

Most welcome!

@rainheaven904 3 года назад

Thank you so much :D

@stepbystepscience 3 года назад

You're welcome!

@zen884 Год назад

Im wondering where did you get the 10^3?

@stepbystepscience Год назад

Because it is 333 kJ (kilojoules) but when you put the number into the equation it has to be in regular joules and not kilojoules. So the 333kJ can be written as 333,000 J or 333 x 10^3 J. Does that help?

@hilamonleojay2131 2 года назад

Is 333 degrees celcius is a constant value of Lf? and sir, why is it there is 10 raise to the power of 3?

@jusjaisinghani8179 4 года назад

nice explanation.

@stepbystepscience 4 года назад

Glad it was helpful!

@ankitgaming9662 4 года назад

Good explanation

@stepbystepscience 4 года назад

Thanks and thanks for the comment.

@maximilianalvarez737 3 года назад

i did it and i ended up with 1277525, don't know why

@tsehayenegash8394 3 года назад

please solve this proplem, How much heat energy is required to change a 40 g ice cube from a solid at -10 degree centigrade to steam at 110 degree centigrade?

@stepbystepscience 3 года назад

This is basically answered in the video.

@tsehayenegash8394 3 года назад

@@stepbystepscience the video did upto gas

@stepbystepscience 3 года назад

Yes, but steam is a gas.

@mutailenunshikokola2727 Год назад

Sancho prof

@stepbystepscience Год назад

Is that good or bad.

@mutailenunshikokola2727 Год назад

@@stepbystepscience lol its good, its a slang for thank you in Zambia

@cinisosimelane Месяц назад

Where is the -15 degrees Celsius

@stepbystepscience Месяц назад

Right next to the -14 degrees Celsius.

@chemistryworld4783 4 года назад

Good video 👍😁😁👍

@stepbystepscience 4 года назад

Thank you 👍

@bavakurefrancois5010 4 месяца назад

Morning okay this examples of finding of specific latent. Heat of evaporation of water how much of mass is12kg and heat energy of536joules and temperature is 30 to40 find the. Specific heat energy 😂